that morph pump is nice, i got one. gauge seems accurate, although it sticks a little at times. heck of a lot easier to use than the old zefal frame pump i've had for 15 years.

i always use a gauge. they make small handheld presta gauges, but i prefer the built-in if its accurate.

beware those 70% off floor pumps from nashbar/perf. my neighhbor had been inflating his mtb tires to 80psi (spec'd 50). the gauge was way off. i recalibrated it against my other 3 gauges, just used a sharpie marker to correct the gauge chart.

so now my neighbor has solved his tire explosion mystery.